3. When running a road race you heard the timer call out 8 minutes as you passed the first mile-marker in the race. a. What quantities will you measure to determine your speed as you travel? Define variables to represent the quantities' values and state the units you will use to measure the value of each of these quantities. b. As you passed mile-marker 6 you heard the timer call out 52 minutes. If you had held a constant speed (rate of change) as you ran from mile marker 1 to mile marker 6, determine the constant speed (in miles per minute) you would have run as you traveled from mile marker 1 to mile marker 5. c. After mile-marker 6 you slowed down and ran at a constant speed of 10 minutes per mile between mile-marker 6 and mile-marker 10. How many minutes did it take you to travel from mile marker 6 to 9